Applicability of additives utilizing fine powder of waste glasses at ground improvement

In this research, the authors are developing a solidifying material for ground improvement using inorganic waste as a raw material. The solidifying material is a mixture of blast furnace slag, inorganic waste containing a large amount of silica (such as waste glass fine powder or fly ash), and an alkaline aid while being heat-treated. In this paper, the authors reviewed the mixing process of fine powder of waste glass or fly ash and heat treatment of an alkaline aid, and produced an additive that was simplified by mixing only. Then, the difference in the performance of the solidifying material depending on the presence or absence of the heat treatment process in the additive manufacturing was verified in terms of the influence on the curing action. Specifically, assuming that the solidifying material to which each additive is added is applied to the high-pressure injection stirring method, that is one of the ground improvement methods, the viscosity of the solidifying material over time and ordinary Portland cement are added separately.